I have a 49 pan. I removed the chain to run a belt drive, runs nice but the 49 has roller bearing which leaks behind the tapered front sprockets, small leaks but with in time will build up. I remove the primary to clean the oil out but its getting old. In the old days they didn't care if the oil was in the primary I try seals on the sprocket shift I cant get it to stop. Has anybody hear of this ? or a seal that will work??

panheaddan, My 53 seeps oil out of the same location, I don't run a primary cover so I get a little slinging action off of the belt. I also have tried to seal this up but I've not had any luck, maybe this thread will help get us a cure. Ed

There is an aftermarket rubber seal to replace the OEM metal seal, on your front sprocket shaft. Unfortunately, this is not something that can be replaced without a teardown. The metal seal has a spiral thread in it, to 'spin' the oil back towards the inside. But, crankcase pressure will still force oil out of it. Plan to replace it on a future teardown/rebuild.

Both of you have Colony slinger replacements with a seal that have failed?
It is not uncommon to find sprocket shafts that have wear grooves from the original slinger. They would prevent the Colony seal from making proper contact, or even tear it up.

It should be basically the same type oil seal as the one you put in your 45. Rubber, or some of the newer synthetic materials. And, like Cotton was saying. If the shaft has any scarring at all, it's a good idea to replace the shaft, if going with the modern type seals.

hello,
some will say I'm nuts, but here it goes. you can take out the old style metal seal slinger. and put in the colony seal. You can do this with out taking the engine apart. I did it to mine. but it is kinda trickey to get out the ret. ring. the seal then can be removed and the new on put in till it is set to the same depth as the old one.(callipers req.)
mbskeam
were there is a will, there is a way.

The biggest problem I have with the Colony unit is installation.
Often the surrounding race has been oversized for new rollers, but sometimes still not enough for a light tap-in interference fit. Fixturing it into a lathe without runout for trimming isn't easy, but at least there is meat to work with!

OK you people think your crazy, well hows this for crazy? If you are running a belt drive for your primary, the breather vapor is part of the seal blow by problem its not main drive oil,its breather pressure.If you have the oiler on the pump shut off to keep the inner primary oiling tube dry you have increased the oil pressure.Try this.. Open it back up a little to let the oil get to that oiling tube and then re-direct that breather oil with a rubber tube to the secondary chain. HEADHOG